FNA-7

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The FNA-7 fuse is an electrical, specialty fuse designed for reliable and efficient protection for electrical circuits. It is a cartridge-style, single-element fuse, available in current ratings from 5 to 30A, with integral mounting brackets for quick and easy installation.

The FNA-7 fuse provides overcurrent protection for lighting, industrial or residential applications. It features a one-piece element construction from an alloy of zinc and copper. The fuse element and interfaces are designed to withstand normal overloads, short-circuits or other abnormal conditions found in electrical circuits. The FNA-7 can be used in single or three-phase applications. It is a single-pole, thermal fuse with time-delay to protect against short-circuit-caused thermal overloads.

The FNA-7 fuse works by using a special type of fuse element, called an overcurrent element. This element consists of a thin, plated metal strip, which is resilient and flexible. It is placed in a tube that contains a small amount of a combustible material. When a circuit is overloaded, the weak resistance offered by the metal strip causes it to heat up and eventually start to burn. This combustion causes an interruption of the joule-heating effect, which causes the fuse to open. The FNA-7 fuse is designed to open and safely disconnect the circuit before any major damage can occur.

The FNA-7 fuse has a two-piece design consisting of a terminal block and an overcurrent element. The terminal block is made from a thick insulating material and is designed to stay in place even during extreme temperatures. The overcurrent element sits in a tube within the terminal block and is secured with a plastic latch. A small spring helps to keep the fuse element as close to its design temperature as possible.

The FNA-7 can be used to control the flow of current in residential and industrial electrical circuits. It is specially designed to protect electrical circuits from damage caused by excessive over-currents, short-circuits, surges and other abnormal operating conditions. The fuse is also designed to provide reliable, dependable and safe protection for both AC and DC circuits. It is UL listed and offers maximum circuit protection.

The FNA-7 is a reliable and safe choice for residential and commercial applications. It is designed to provide reliable, dependable and safe protection from over-currents, short-circuits, surges and other abnormal operating conditions. It is UL listed and provides maximum circuit protection, making it an ideal choice for safety-conscious homeowners or businesses. The FNA-7 is a simple and economical way to protect circuits from damage. It is easy to install and available in a wide range of current ratings.

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